Display screen or a portion thereof with graphical user interface



FIG. 1 is a front view of a display screen or a portion thereof with graphical user interface; and,

FIG. 2 is a front view of a second embodiment thereof.

The portion of the display screen is understood to be flush with the perimeter of the graphical user interface. 

CLAIM The ornamental design for a display screen or a portion thereof with graphical user interface, as shown and described. 